This was a relatively small flock of birds but they were quite spectacular as they flew within 30 meters of me. The visual display changed as the birds became more closely knit, but the surprise was the noise from all those beating wings like a huge gust of wind. They were chased by two sparrow hawks before making it to their roast area. One of the sparrow hawks perched in a bush near the starlings waiting for his opportunity for a meal, by which time it was almost dark.